Book/Report

FZJ-2018-02540

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ermittlung der akustischen Phononendispersionszweige von CePd$_{3}$ durch inelastische Neutronenstreuung

Severing, A. (Corresponding author)FZJ*

1985
Kernforschungsanlage Jülich, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/18230

Report No.: Juel-2006

Abstract: The result of this thesis is, that the phonon dispersion of CePd$_{3}$, measured by inelastic neutron scattering, does not show any phonon softening effects due to valence fluctuations as it is observed in the phonon dispersion spectra of TmSe, SmS under pressure and Sm$_{.75}$Y$_{.25}$S in dependence of the temperature. Even at low temperature no softening effects could be detected in comparison to the room temperature data. However we see indications for the existence of intermediate valence induced electron-phonon couplings in the linewidth of the longitudinal acoustic phonon in <111>-direction with reduced wavevector [...] = 0.2. This phonon seems to be broadened at 135K. If this broadening is a real intermediate valence effect, this effects manifest themselves much weaker in CePd$_{3}$ than in the substances with NaCl-structure. The question whether such couplings realy exist can only be answered by further measurements.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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